We look at the division of 168595 by 21 
Let's see how many times 21 fits into 168595.

Let's proceed to step 1:
If we divide 1 by 21, we get 0 and a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Grab the next digit (6) from the dividend, add it to 1, then carry on: 16 / 21

Going ahead to step 2:
16 divided by 21 is 0 with a remainder of 16.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 16 to get 16.
Grab the next digit (8) from the dividend, add it to 16, then carry on: 168 / 21

On to step 3:
When dividing 168 by 21, we get 8 with a remainder of 0.
Use 8 as the next digit of our solution. 
Result so far: 8.0
If we take 168 away from 168, we end up with 0.
Grab the next digit (5) from the dividend, add it to 0, then carry on: 5 / 21

Let's proceed to step 4:
The number 21 fits into 5 0 times, leaving a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 80.0
Subtracting 0 from 5 leaves us with 5.
Grab the next digit (9) from the dividend, add it to 5, then carry on: 59 / 21

Step 5:
59 divided by 21 is 2 with a remainder of 17.
Write down 2 as next digit of the result. 
Result so far: 802.0
If we take 42 away from 59, we end up with 17.
Fetch the next digit (5) from the dividend, attach it to 17 and continue: 175 / 21

On to step 6:
When dividing 175 by 21, we get 8 with a remainder of 7.
Record the quotient 8 as the next digit in the result. 
Result so far: 8028.0
If we subtract 168 from 175, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On to step 7:
The number 21 fits into 70 3 times, leaving a remainder of 7.
Record the quotient 3 as the next digit in the result. 
Result so far: 8028.3
Subtracting 63 from 70 leaves us with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Step 8:
When dividing 70 by 21, we get 3 with a remainder of 7.
Record the quotient 3 as the next digit in the result. 
Result so far: 8028.33
The remainder is 7 after subtracting 63 from 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

After the division, we end up with 8028.33 and a remainder of 0.007.